The vast majority of UberEATS users that Business Insider spoke
to seemed to have a positive experience but some said their
orders were cancelled and others said they'd received the wrong
food.

My own experience wasn't without issue. I placed an order with
Hotbox in
Spitalfields via the UberEATS app but it was cancelled around
15 minutes later. I tried again and the same thing happened.
Thankfully, my third order was a success. Altogether, it took
around an hour and a half for my delivery to turn up.

Hotbox told Business Insider: "There was plenty of demand but
there were a lot of issues with drivers and orders being
cancelled through the system. I'm sure all the snags will be
sorted by them [Uber] very quickly."

Another potential issue for Uber is the fact that a number of its
early deliveries were made by people wearing the uniform of rival
food delivery company Deliveroo.

The food delivery cyclists that we spoke to earlier this month
said they planned to work for Uber and Deliveroo or Take Eat
Easy.

Alex Czarnecki, General Manager for UberEATS said in a statement:

At noon today it would seem London
got very hungry indeed. We were blown away by the demand we saw
for UberEATS in our first couple of hours but still managed to
get most people a tasty and affordable lunch. Unfortunately,
due to the incredibly high demand, a handful of orders took a
little longer than we'd have liked. We are following up with
them to make sure they can get lunch on us next time
round.

On the Deliveroo clothing, Czarnecki
added:

Couriers do not have to deliver exclusively with us — UberEATS is
a completely flexible way for people to make
money. Thousands of people, including some who deliver with
other companies, have already signed up to deliver with UberEATS
in London.